Wringer



0. MOON WRINGER Jan. 22, 1957 2 SheeRs-Sheet 1 m ATTORNEY M IN VENTOR C. MOON Jan. 22, 1957 WRINGER 2 Sheets-Sheet 2 Filed Aug. 21, 1953 ATTORNEY M IN VENTOR FIG.

so as to make the wringing safe.

United States Patent This invention is intendcdto'irnproveWringers ofthe type-in which the roll pressure isrelease'd bytheinstinctive reaction of the user in attemptingtotescape from the rolls by positively blocking actuation ofthe safety release whilethe roll pressure isbeing reset. This eliminates the tendency for the operator'todefe'at the resetting of the roll pressure by'inadvertent actuation of the safety release. Because a *substantialforce is required to'reset the roll pressure, While onlya very smallforce'is' required to actuate the safetyreleasqithas "heen'found that unless --a great .deal of care is taken,the-safetyrelease will be actuated to release the rollpressure 'atthe end of the resetting operation.

Inthe accompanying drawings, Fig. l is a side View partly broken away of a wringer; 'Fig. 2 is an end view of the manual releasefor the roll'pressureyFig. 3 is a top plan view showingthe safety release latch bar in'the v latched position; Fig. 4 is a viewsirnilarto Fig. 3 showing'the safety-release latchbar'inthe released position; Fig. 5 is a section on 'line5'5 of Fig. l'with the latch release bar in the latched position;Fig.6 is a view similar 'to Fig. 5 with the latch release *bar in the released position; Fig. 7 is a perspective of the latch member for holdingthe latch release'bar'in the latched position; and'Fig.

-8 is a section on line'8-8 of Fig. 4. i p

The invention is shown'applied' to a Wringer of the construction disclosed in PatentNo. 2,595 j 149, *Kauifman. As there disclosed, there is a wringerhead 1 for mounting on a wringer post 2, which'is yieldably indexed in the desired wringing position by -a cam-faceddetent J3 engaging the selected opening '4 in a collar5 on the wringer post and there is a positive index'pin '6 which is moved through one of the holes '4 in thevdriving position to positively index thewringer. The yielding index 10- cates the wringer in the desired index position, but does not restrain the wringer from movement out of the index position and by itself is not safe for actual wringing. The positive indexpin 6 provides the necessary restraint Thepositive index .pin is biased out of the index position by a spring 7 and. is

cammed downward into the index locking position when ever the gearing is moved to the driving position by the control lever 8. While the mechanism so far described is desirable, simpler forms of drive gearing and indexing may be used.

The wringer has rolls 9 and 19, which are carried in a frame comprising a lower frame 11' and a top frameJlZ and which-are urged together by the usual pressuremechanism (not shown). The top frame r12. is pivoted at 13 on a bracket 14 fixed to the bottom frame 11 and pivoted 0n the wriuger head 1 on. pivot screws 15 and 1:6. *The pivot screws 15 and .l6care-fiarranged-=directly above a flexible coupling 17, which connects the driving mechanism contained within the wringer head 1 with the shaft 18 of the lower roll 10. At the outer end, the top bar 12 is connected to the bottom frame by a toggle cornprising an inner link 19 and an outer link 20, which are 2 pivotcdtogether at 21. Theinner link His-pivoted on the bottom frame at 22 and the outer link20 is pivoted on the top frame at 23. Thepivot points ,21, 22, and 23 are so arranged that When'the toggle links are'in the set .or pressure applying position, the pivot point 21 is short of a center line connecting the pivot points 22 and 23, "thereby making the toggle links of the unstable type where a latching forceis required to holdthe toggle links '19 and 20 in the set or pressure applying position. If the pivot point 21 is almost in line with'the pivot points 22 and 23, thelatching force required to hold the toggle'links in the set position can be-very small. Howeven'with this arrangement, due to manufacturingvariations, the pivot point 21 will occasionally be slightly beyond the center line of the pivot points 22 and 23', thereby making the toggle stable. the unstable type, it is desirable that the latching arrangement for'holding the toggle inthe set position be able to release the toggle-eventhough the, pivo t'points ofthe togglear'e in'an over-center or stable position. The toggle 19, 20 isheld in the set or pressure position by ala-tch release bar 24 beneath the 'bottomframe l1 and urged upward and to the right, as viewed in Fig, Liby tension springs'25 and '26. 'At the left-hand end 'ofthe latch .release bar is a stabbing 27, which'engages "a 'catch28 fixed to-the wringer head 1 andholds the latch release bar 24 in-the left-hand position. *Atthe right-hand end -ofthe-latch release bar'is a'tongue 29, which-extends through anopening 30 in the lower end of the'toggle link .21 and latches or holds the toggle in the set'or rpressure applying position. "In this -position,'the=lower iend of the-toggle IinkZtP-buttsagainst,a tab B1 01]"Il16 Llatchrelease bar, which c-auses the latch'release bar'to 3136 moved to'the left, as viewed in Fig. '1,-as the'togg'le -link:comes down-to the-set position and "the tongue '29 entersthe opening 3i). Fromone aspect, the tongue 29 andfthe opening 30 constitute alatchholding the toggle in setposition. The stabbing :27 and the -catch '28 constitute; aJdetent, which hold the latchreleasebar in the latching'position. It is obvious that when the left-hand 1 end of thelatchrelease'bar 24 is depressed so that the stabbing comes below the-catch 28, the springs and 26=wi1l urge thelatch release bar to the r'ig ht'an'd will therebyEeflecbarelease of the toggle 19,20. If the pivot point 21 is inan over-center or-stable position, the shoulsder'31 on the latch release barwill push the toggle link 26 past dead center intoan unstable position. On the other hand, if the pivot point "21 is'shortof dead center so that the toggle 19, 20' is unstable'inthe pressure or setgposition, then the roll pressure acting on the qtoggle will cause the toggleto release. An inclined surface "32 on the latch-release bar-.24. depresses the latch release'bar iandmoves the tongue '29 out of the opening ,so thatthe latch release bardoesnot interfere with the opening of. the. toggle.

In. this wringer, 'therearc two expedients providedfor releasing the: toggle 19,12ilandthereby releasingthe roll pressure, a manual releaseandan instinctive release. The manual release illustrated in Fig. 2 comprises pivoted release bars-331m opposite sides of the wringer rolls,-ea'ch of'which isfiXed to a bell: crank lever 34' pivoted at 35 vonthe lower. frame member 11. The-bell crank levers b4 are.connected' by a slotted link -36 receiving'pins37 .m the respective :bell cranklevers. A tensio11-;spring38 :betwe'en a slide 39.;and one o f the bell crank levers 34 -,urges ,the slide upwardzagainst the adjacent ends "40 "of the bell crank levers, thereby holding the release bars in the position illustrated. With this arrangement, a push or pull on either of the release bars 33 causes one of the bell crank levers 34 to move in a direction to depress the slide 39 against the tension of the spring 38. The lower end of the slide 39 has tabs 42 which engage a Accordingly, even if thetoggle' is of pair of upstanding projections 41 on the latch release bar 24 and depresses the latch release bar until the stabbing or detent 27 is below the catch 28. As soon as this point ismeached, the springs 25 and 26 move the latch release bar to the right, as viewed in Fig. 1, and the toggle 19, 20 is released, as explained above.

The operation of the instinctive release depends upon a pivotal movement of the wringer frame about the screws and 16 swinging the detent 27 to one side of the catch 28 and thereby permitting the springs 25 and 26 to move the latch release lever 24 to the right. Since the catch 28 is carried on the wringerhead and the latch releasing lever 24 is carried on the wringer frame, it is evident from Fig. 3 that a slight pivoting movement ofthe frame relative to the wringer head will move the detent, 27 to one side of the catch 28 and thereby effect the pressure release. The-releasing action of the toggle 19, is the same, whether effected by the manual release bars 33, or

- by the instinctive pivoting of the wringer frame relative to the wringer head.

When the roll pressure is released by the opening of the toggle 19, 20, the latch release bar24 moves to the right, as viewed in Fig. 1, and comes to the position shown in Figs. 4 and 6 where projections 41 on the latch bar 24 move into the plane of an opening 43 in the bottom frame member and straddle depending tabs 44 on the catch 28. As is apparent from Figs. 4 and 6, the projections 4-1 on the latch release bar 24 cooperate with the tabs 44 on the catch 28 and the sides of the opening 43 to make an essentially rigid connection between the wringer frame and the wringer head preventing pivotal movement of the frame relative to the head. From one aspect, the projections 41 block the pivotal movement of the framerelative to the head, which is utilized to actuate the instinctive safety release. In order to position the latch release bar 24 in the Fig. 4 and 6 position, the dependingtabs 44 on the catch 28 have parts 45', which cooperate with a the catch 29 to enter the opening 30 and latch the toggle links in the pressure applying position. At the same time, the catch 27 is moved under the latch member 28 on the shoulder 46 on the latch release bar 24 and'limit the movement so that in the released position the projections 41 are in the plane of the opening 43 and are positioned to block the pivotal movement of the wringer frame relative to the wringer head. It is .not essential that pivotal movement between the wringer frame and head be completely blocked in the roll pressure released position of the latch release bar 24. It is sufficient that while the rollpressure is released the pivotal movement between the wringer frame and head be sufiiciently restricted that the catch 27 on the latch release bar 24 will always be in line with part of the latch member 28 on the wringer frame. Since the instinctive release 'of'the pressure between the rolls can only take place when the catch 27 is moved completely out of line with the latch 28 on the wringer head, the partial or restricting blocking of the movement of the wringer frame relative to the head is sufficient to prevent actuation of the safety release until the latch release bar 24 is moved from the position it occupies when the roll pressure is released.

As the roll pressure is released either instinctively or .mannally, the toggle links 19, 20 swing upward in a counterclockwise direction about their respective pivots 22 and 23, thereby moving the top bar 12 upward and re leasing the pressure between the wringer rolls 9 and 10. The roll pressure is reset by moving the toggle links in a clockwise direction, as viewed in Fig. 1, using the longer outer toggle link 20 as a handle to secure the leverage desirable for resetting the roll pressure. As the toggle links approach the Fig. 1 position, thelower end of the toggle link 20 engages the projection 31 on the latch release bar 24 and moves it to the left, thereby permitting wringer head, thereby holding the latch release bar in the latched position shown in Fig. 1; Until the projections 41 move clear of the tabs 44 on the latch member 28, pivotal movement of the wringer frame relative to the wringer head is blocked and actuation of the instinctive safety release is thereby prevented. The projections 41 do not move clear of the tabs 44, until the very end of the pressure resetting, when the mechanical advantage of the toggle is so great that only a very slight force is required. While it is theoretically possible for some of this slight force to be applied in a direction to pivot the wringer frame relative to the wringer head and thereby prevent the catch 27 from being engaged by the latch member 28, as a practical matter, this does not take place, because at the final stage of the'resetting' of the roll pressure, the resettingforce is veryslight and is invariably directly in line with the wringer frame.

What is claimed as new is:

1. In a wringer, a support, a roll carrying frame pivoted on the support and including releasable and resettable roll pressure sustaining means and a safety release for the roll pressure sustaining means, a part associated with the safety release moveable to one position in the set condition of the safety release and to another position in the released condition of the safety release, means actuated in response to a predetermined amount of pivotal movement of the frame relative to the support for releasing the safety release, resetting means for the roll pressure sustaining means and the safety release, and means adapted to engage said part in said other position but not in said one position for restricting the pivotal movement of the frame 'to less than the predetermined amount required for releasing the safety release until the roll pressure sustaining means and the safety release for the roll pressure sustaining means are'reset.

2. In a wringer, a support, a roll carrying frame pivoted on the support, said frame comprising a bottom frame and a separable top frame connected to the bottom frame at the end remote from the support by toggle links which in set position resist separation of the top frame and when released permit separation of the top frame under roll pressure, a release member movable toward and away from the support extending beneath the bottom frame and moved by the toggle links toward the supportas the .toggle links are moved to the set position, said release member cooperating with the toggle links to effect release of the toggle links when moved away from the support, means urging the release member away from the support, a latch on the support cooperating with the release memher to hold it against movement away from the support, said latch being released by a predetermined amount of pivotal movement of the frame relative to the support, and parts on the release member cooperating with the latch to restrict pivotal movement of the frame relative to the support to less than the predetermined amount required to release said latch as the release member moves away from the support.

References Cited in the file of this patent UNITED STATES PATENTS Etten Feb. 22, 1944 

